Counting xml elements using javascript

Question

How can I count the number of certain xml elements inside the xml file that import.
Example xml:
<list>
     <product>
          <name>Product_01</name>
          <detail>info here</detail>
     </product>
     <product>
          <name>Product_02</name>
          <detail>info here</detail>
     </product>
     <product>
          <name>Product_03</name>
          <detail>info here</detail>
     </product>
</list>
I would like to count the number of product -elements in this example xml.
I'm using javascript for scripting.
Thanks.

Answer 1

#target indesign
#include "/Applications/Adobe InDesign CS3/Scripts/Xml Rules/glue code.jsx"
var myDocument = app.activeDocument;
var myCounter = 0;
var myRuleSet = new Array (new ProcessProduct);
with(myDocument){
    var elements = xmlElements;
    __processRuleSet(elements.item(0), myRuleSet);
alert("Found " + myCounter + " product elements");
function ProcessProduct(){
    this.name = "ProcessProduct";
    this.xpath = "//product";   
    this.apply = function(myElement, myRuleProcessor){
        with(myElement){
            myCounter++;
    return true;